----------------------------------------------------------------------------------------------------------------------------------------------------------------
      name:  <unnamed>
       log:  E:\p2014\project2014sow\zhoula\sow_main.log
  log type:  text
 opened on:  29 May 2014, 15:23:33

. 
. use sow_data_2013oct

. 
.   
. ******************************************
. **Table 2: Basic Summary Statistics
. * Overall Summary statistics
. 
. sum sow0 sow1 sow2 pig  pop_regist pop_migout age_vil edu_vil male_vil land  lhouse_val surname_vil no_xnh subsidy    insuredpig snow sow3 sow4 

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        sow0 |       480    16.25208    21.44627          0        219
        sow1 |       385     29.1039    31.79417          1        358
        sow2 |       304    31.16776      34.456          0        355
         pig |       480    356.2021    228.3551          0       1741
  pop_regist |       471    1029.093    677.7552        214       8820
-------------+--------------------------------------------------------
  pop_migout |       471    196.0276    116.4303          0        734
     age_vil |       471    33.21172    2.066828   27.80301   48.56757
     edu_vil |       471    5.950849    .7530398   3.801537   9.331491
    male_vil |       471    .5431609     .025486   .4307692   .6423358
        land |       471    4.310075    1.965774          0   11.07039
-------------+--------------------------------------------------------
  lhouse_val |       474    9.827301    .6230607   8.575369   11.73608
 surname_vil |       471    5.360934     2.67798          1         24
      no_xnh |       471    551.5244    300.7457          0       2028
     subsidy |       471    182.1699    92.14903          0        598
  insuredpig |       480    22.66875    26.87846          0        325
-------------+--------------------------------------------------------
        snow |       480    .1854167    .8306472          0         12
        sow3 |       321    38.40187    34.34627          0        270
        sow4 |       321    42.89097    37.74185          2        295

. 
.  
. * Summary Statistics by Experimental Group
. 
. sort group

.  
. by group: sum sow0 sow1 sow2 pig  pop_regist pop_migout age_vil edu_vil male_vil land  lhouse_val surname_vil no_xnh subsidy    insuredpig snow sow3 sow4 

----------------------------------------------------------------------------------------------------------------------------------------------------------------
-> group = 1

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        sow0 |       120       17.95     26.5339          0        219
        sow1 |       102    28.80392    43.13622          2        358
        sow2 |        75       32.32    46.45752          0        355
         pig |       120     363.325    248.2762          6       1741
  pop_regist |       117    1043.692    653.7553        222       4772
-------------+--------------------------------------------------------
  pop_migout |       117    189.3077    126.9205         17        734
     age_vil |       117    33.08084    2.119934   27.91349   42.68182
     edu_vil |       117    5.989686    .7668939   3.853556   9.030303
    male_vil |       117    .5403402    .0277416   .4307692   .6423358
        land |       117    4.098029    1.908199         .2     10.336
-------------+--------------------------------------------------------
  lhouse_val |       120     9.86804    .5938092   8.575369   11.56895
 surname_vil |       117    5.384615    3.078978          1         24
      no_xnh |       117    551.0684    307.0721          0       2028
     subsidy |       117    182.8803    89.60855          0        476
  insuredpig |       120    15.43333    10.71223          0         52
-------------+--------------------------------------------------------
        snow |       120    .1666667      1.1474          0         12
        sow3 |        74    31.81081    23.23712          0         98
        sow4 |        74    35.94595     25.8239          2        108

----------------------------------------------------------------------------------------------------------------------------------------------------------------
-> group = 2

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        sow0 |       120    13.16667    14.24653          0         69
        sow1 |        98    28.09184    20.51757          2        120
        sow2 |        68    26.39706    23.70096          1        121
         pig |       120    338.2917    228.1253          0       1338
  pop_regist |       118    1017.932    672.0391        214       5886
-------------+--------------------------------------------------------
  pop_migout |       118    193.7119    103.0677         11        528
     age_vil |       118    33.39516    2.276162   29.51969   48.56757
     edu_vil |       118    5.996307     .774399   4.240741   9.331491
    male_vil |       118    .5451513    .0256179   .4763705   .6148148
        land |       118    4.284668    1.951887          0   8.377143
-------------+--------------------------------------------------------
  lhouse_val |       118    9.753982    .6319665   8.588839   11.53475
 surname_vil |       118    5.186441    2.466698          1         15
      no_xnh |       118    532.1271    299.2124          1       1543
     subsidy |       118    178.7797    99.59251          1        516
  insuredpig |       120    21.50833    19.47979          0         81
-------------+--------------------------------------------------------
        snow |       120          .1    .4377175          0          3
        sow3 |        74    35.68919    31.35564          1        212
        sow4 |        74     39.7973    35.79201          2        248

----------------------------------------------------------------------------------------------------------------------------------------------------------------
-> group = 3

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        sow0 |       240    16.94583    21.52884          0        169
        sow1 |       185    29.80541    29.41504          1        230
        sow2 |       161    32.64596    31.65999          1        200
         pig |       240    361.5958    218.3833          0       1148
  pop_regist |       236    1027.436    694.7702        225       8820
-------------+--------------------------------------------------------
  pop_migout |       236    200.5169    117.5847          0        710
     age_vil |       236    33.18488    1.928627   27.80301   43.85714
     edu_vil |       236    5.908865    .7360022   3.801537    8.64712
    male_vil |       236    .5435641    .0242142   .4827982   .6138393
        land |       236    4.427903    1.999421          0   11.07039
-------------+--------------------------------------------------------
  lhouse_val |       236    9.843246    .6325872   8.667846   11.73608
 surname_vil |       236    5.436441    2.571568          1         21
      no_xnh |       236    561.4492    299.1482          0       1929
     subsidy |       236    183.5127    89.85115          2        598
  insuredpig |       240    26.86667    34.01758          0        325
-------------+--------------------------------------------------------
        snow |       240       .2375    .7908009          0          6
        sow3 |       173     42.3815    38.86506          4        270
        sow4 |       173    47.18497    42.18978          2        295


. 
. 
. foreach var of varlist sow0 sow1 sow2 pig  pop_regist pop_migout age_vil edu_vil male_vil land  lhouse_val surname_vil no_xnh subsidy    insuredpig snow sow3 
> sow4 {
  2. reg `var' groupd1 groupd2 groupd3,nocon
  3. test groupd1=groupd2=groupd3
  4. }

      Source |       SS       df       MS              Number of obs =     480
-------------+------------------------------           F(  3,   477) =   93.34
       Model |  128386.337     3  42795.4458           Prob > F      =  0.0000
    Residual |  218708.663   477  458.508726           R-squared     =  0.3699
-------------+------------------------------           Adj R-squared =  0.3659
       Total |      347095   480  723.114583           Root MSE      =  21.413

------------------------------------------------------------------------------
        sow0 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |      17.95   1.954714     9.18   0.000     14.10909    21.79091
     groupd2 |   13.16667   1.954714     6.74   0.000     9.325752    17.00758
     groupd3 |   16.94583   1.382191    12.26   0.000      14.2299    19.66177
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   477) =    1.75
            Prob > F =    0.1751

      Source |       SS       df       MS              Number of obs =     385
-------------+------------------------------           F(  3,   382) =  107.10
       Model |  326309.754     3  108769.918           Prob > F      =  0.0000
    Residual |  387973.246   382  1015.63677           R-squared     =  0.4568
-------------+------------------------------           Adj R-squared =  0.4526
       Total |      714283   385  1855.28052           Root MSE      =  31.869

------------------------------------------------------------------------------
        sow1 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   28.80392   3.155507     9.13   0.000     22.59958    35.00826
     groupd2 |   28.09184   3.219261     8.73   0.000     21.76215    34.42153
     groupd3 |   29.80541    2.34306    12.72   0.000      25.1985    34.41231
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   382) =    0.10
            Prob > F =    0.9060

      Source |       SS       df       MS              Number of obs =     304
-------------+------------------------------           F(  3,   301) =   83.39
       Model |  297313.581     3  99104.5269           Prob > F      =  0.0000
    Residual |  357727.419   301  1188.46319           R-squared     =  0.4539
-------------+------------------------------           Adj R-squared =  0.4484
       Total |      655041   304  2154.74013           Root MSE      =  34.474

------------------------------------------------------------------------------
        sow2 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |      32.32   3.980726     8.12   0.000     24.48642    40.15358
     groupd2 |   26.39706   4.180598     6.31   0.000     18.17016    34.62396
     groupd3 |   32.64596   2.716939    12.02   0.000     27.29936    37.99256
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   301) =    0.84
            Prob > F =    0.4323

      Source |       SS       df       MS              Number of obs =     480
-------------+------------------------------           F(  3,   477) =  388.81
       Model |  60953928.1     3    20317976           Prob > F      =  0.0000
    Residual |  24926398.9   477  52256.6015           R-squared     =  0.7098
-------------+------------------------------           Adj R-squared =  0.7079
       Total |    85880327   480  178917.348           Root MSE      =   228.6

------------------------------------------------------------------------------
         pig |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |    363.325   20.86796    17.41   0.000     322.3205    404.3295
     groupd2 |   338.2917   20.86796    16.21   0.000     297.2872    379.2962
     groupd3 |   361.5958   14.75587    24.51   0.000     332.6013    390.5904
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   477) =    0.49
            Prob > F =    0.6109

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  360.52
       Model |   498844951     3   166281650           Prob > F      =  0.0000
    Residual |   215855234   468  461229.133           R-squared     =  0.6980
-------------+------------------------------           Adj R-squared =  0.6960
       Total |   714700185   471  1517410.16           Root MSE      =  679.14

------------------------------------------------------------------------------
  pop_regist |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   1043.692   62.78638    16.62   0.000     920.3142     1167.07
     groupd2 |   1017.932   62.51977    16.28   0.000      895.078    1140.786
     groupd3 |   1027.436   44.20815    23.24   0.000     940.5654    1114.307
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.04
            Prob > F =    0.9573

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  444.15
       Model |  18109704.9     3  6036568.31           Prob > F      =  0.0000
    Residual |  6360654.06   468  13591.1412           R-squared     =  0.7401
-------------+------------------------------           Adj R-squared =  0.7384
       Total |    24470359   471  51954.0531           Root MSE      =  116.58

------------------------------------------------------------------------------
  pop_migout |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   189.3077   10.77792    17.56   0.000     168.1286    210.4868
     groupd2 |   193.7119   10.73216    18.05   0.000     172.6227     214.801
     groupd3 |   200.5169    7.58878    26.42   0.000     185.6046    215.4292
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.39
            Prob > F =    0.6755

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =40490.95
       Model |   519527.67     3   173175.89           Prob > F      =  0.0000
    Residual |  2001.59093   468   4.2769037           R-squared     =  0.9962
-------------+------------------------------           Adj R-squared =  0.9961
       Total |  521529.261   471  1107.28081           Root MSE      =  2.0681

------------------------------------------------------------------------------
     age_vil |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   33.08084   .1911929   173.02   0.000     32.70514    33.45654
     groupd2 |   33.39516   .1903811   175.41   0.000     33.02105    33.76927
     groupd3 |   33.18488   .1346197   246.51   0.000     32.92034    33.44941
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.72
            Prob > F =    0.4881

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) = 9793.91
       Model |  16680.1705     3  5560.05684           Prob > F      =  0.0000
    Residual |  265.686137   468   .56770542           R-squared     =  0.9843
-------------+------------------------------           Adj R-squared =  0.9842
       Total |  16945.8567   471  35.9784642           Root MSE      =  .75346

------------------------------------------------------------------------------
     edu_vil |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   5.989686   .0696576    85.99   0.000     5.852805    6.126566
     groupd2 |   5.996307   .0693618    86.45   0.000     5.860008    6.132606
     groupd3 |   5.908865   .0490462   120.48   0.000     5.812487    6.005244
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.74
            Prob > F =    0.4793

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =71343.48
       Model |  138.957639     3  46.3192131           Prob > F      =  0.0000
    Residual |   .30384545   468  .000649242           R-squared     =  0.9978
-------------+------------------------------           Adj R-squared =  0.9978
       Total |  139.261485   471  .295671942           Root MSE      =  .02548

------------------------------------------------------------------------------
    male_vil |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   .5403402   .0023556   229.38   0.000     .5357112    .5449692
     groupd2 |   .5451513   .0023456   232.41   0.000      .540542    .5497606
     groupd3 |   .5435641   .0016586   327.72   0.000     .5403049    .5468234
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    1.11
            Prob > F =    0.3316

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  755.86
       Model |  8758.26089     3   2919.4203           Prob > F      =  0.0000
    Residual |  1807.59157   468  3.86237515           R-squared     =  0.8289
-------------+------------------------------           Adj R-squared =  0.8278
       Total |  10565.8525   471  22.4328078           Root MSE      =  1.9653

------------------------------------------------------------------------------
        land |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   4.098029   .1816914    22.55   0.000     3.740998    4.455061
     groupd2 |   4.284668   .1809199    23.68   0.000     3.929152    4.640184
     groupd3 |   4.427903   .1279297    34.61   0.000     4.176515     4.67929
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    1.12
            Prob > F =    0.3288

      Source |       SS       df       MS              Number of obs =     474
-------------+------------------------------           F(  3,   471) =39332.50
       Model |  45777.8418     3  15259.2806           Prob > F      =  0.0000
    Residual |   182.72731   471  .387956072           R-squared     =  0.9960
-------------+------------------------------           Adj R-squared =  0.9960
       Total |  45960.5691   474   96.963226           Root MSE      =  .62286

------------------------------------------------------------------------------
  lhouse_val |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |    9.86804   .0568592   173.55   0.000      9.75631    9.979769
     groupd2 |   9.753982    .057339   170.11   0.000      9.64131    9.866654
     groupd3 |   9.843246   .0405448   242.77   0.000     9.763575    9.922917
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   471) =    1.15
            Prob > F =    0.3170

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  627.65
       Model |  13541.3628     3  4513.78759           Prob > F      =  0.0000
    Residual |  3365.63722   468  7.19153253           R-squared     =  0.8009
-------------+------------------------------           Adj R-squared =  0.7997
       Total |       16907   471   35.895966           Root MSE      =  2.6817

------------------------------------------------------------------------------
 surname_vil |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   5.384615   .2479236    21.72   0.000     4.897434    5.871797
     groupd2 |   5.186441   .2468708    21.01   0.000     4.701328    5.671553
     groupd3 |   5.436441    .174564    31.14   0.000     5.093414    5.779467
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.35
            Prob > F =    0.7063

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  526.84
       Model |   143336063     3  47778687.7           Prob > F      =  0.0000
    Residual |  42442874.9   468  90689.9037           R-squared     =  0.7715
-------------+------------------------------           Adj R-squared =  0.7701
       Total |   185778938   471  394435.113           Root MSE      =  301.15

------------------------------------------------------------------------------
      no_xnh |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   551.0684   27.84111    19.79   0.000     496.3593    605.7774
     groupd2 |   532.1271   27.72289    19.19   0.000     477.6504    586.6039
     groupd3 |   561.4492   19.60304    28.64   0.000     522.9283      599.97
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.37
            Prob > F =    0.6888

      Source |       SS       df       MS              Number of obs =     471
-------------+------------------------------           F(  3,   468) =  611.32
       Model |  15632378.4     3  5210792.81           Prob > F      =  0.0000
    Residual |  3989137.56   468   8523.7982           R-squared     =  0.7967
-------------+------------------------------           Adj R-squared =  0.7954
       Total |    19621516   471  41659.2696           Root MSE      =  92.324

------------------------------------------------------------------------------
     subsidy |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   182.8803   8.535395    21.43   0.000     166.1079    199.6528
     groupd2 |   178.7797   8.499152    21.04   0.000     162.0784    195.4809
     groupd3 |   183.5127   6.009808    30.54   0.000     171.7032    195.3223
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   468) =    0.11
            Prob > F =    0.8977

      Source |       SS       df       MS              Number of obs =     480
-------------+------------------------------           F(  3,   477) =  122.00
       Model |  257331.808     3  85777.2694           Prob > F      =  0.0000
    Residual |  335381.192   477  703.105224           R-squared     =  0.4342
-------------+------------------------------           Adj R-squared =  0.4306
       Total |      592713   480  1234.81875           Root MSE      =  26.516

------------------------------------------------------------------------------
  insuredpig |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   15.43333   2.420581     6.38   0.000     10.67701    20.18965
     groupd2 |   21.50833   2.420581     8.89   0.000     16.75201    26.26465
     groupd3 |   26.86667   1.711609    15.70   0.000     23.50344    30.22989
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   477) =    7.59
            Prob > F =    0.0006

      Source |       SS       df       MS              Number of obs =     480
-------------+------------------------------           F(  3,   477) =    8.74
       Model |  18.0708333     3  6.02361111           Prob > F      =  0.0000
    Residual |  328.929167   477  .689578966           R-squared     =  0.0521
-------------+------------------------------           Adj R-squared =  0.0461
       Total |         347   480  .722916667           Root MSE      =  .83041

------------------------------------------------------------------------------
        snow |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   .1666667   .0758056     2.20   0.028     .0177124    .3156209
     groupd2 |         .1   .0758056     1.32   0.188    -.0489542    .2489542
     groupd3 |      .2375   .0536027     4.43   0.000     .1321735    .3428265
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   477) =    1.14
            Prob > F =    0.3215

      Source |       SS       df       MS              Number of obs =     321
-------------+------------------------------           F(  3,   318) =  137.11
       Model |  479878.976     3  159959.659           Prob > F      =  0.0000
    Residual |  370994.024   318  1166.64787           R-squared     =  0.5640
-------------+------------------------------           Adj R-squared =  0.5599
       Total |      850873   321   2650.6947           Root MSE      =  34.156

------------------------------------------------------------------------------
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   31.81081   3.970581     8.01   0.000     23.99888    39.62274
     groupd2 |   35.68919   3.970581     8.99   0.000     27.87726    43.50112
     groupd3 |    42.3815    2.59685    16.32   0.000     37.27233    47.49068
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   318) =    2.79
            Prob > F =    0.0632

      Source |       SS       df       MS              Number of obs =     321
-------------+------------------------------           F(  3,   318) =  141.38
       Model |  597990.176     3  199330.059           Prob > F      =  0.0000
    Residual |  448355.824   318  1409.92398           R-squared     =  0.5715
-------------+------------------------------           Adj R-squared =  0.5675
       Total |     1046346   321  3259.64486           Root MSE      =  37.549

------------------------------------------------------------------------------
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd1 |   35.94595   4.364977     8.24   0.000     27.35806    44.53383
     groupd2 |    39.7973   4.364977     9.12   0.000     31.20941    48.38518
     groupd3 |   47.18497   2.854794    16.53   0.000      41.5683    52.80164
------------------------------------------------------------------------------

 ( 1)  groupd1 - groupd2 = 0
 ( 2)  groupd1 - groupd3 = 0

       F(  2,   318) =    2.65
            Prob > F =    0.0723

. 
. 
. 
. ***** Note 1: Following a referee's comment, we use robust standard error for all regressions 
. ******instead of robust standard errors clustered at the township level which are used in our earlier versions
. *****Note 2: We corrected some small coding errors in our original data which led to our current results slightly different 
. ******from our earlier versions.
. 
. **Table3: OLS Regression Results on the Relationship between Sow Insurance and Subsequent Sow Production.
. 
. 
. reg sow3 insuredpig ,robust  

Linear regression                                      Number of obs =     321
                                                       F(  1,   319) =  241.28
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.6680
                                                       Root MSE      =  19.822

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.215283   .0782381    15.53   0.000     1.061355    1.369211
       _cons |    11.1394   1.710335     6.51   0.000     7.774434    14.50436
------------------------------------------------------------------------------

. 
. 
. reg sow3 insuredpig towndummy* ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 18,   302) =   76.64
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7793
                                                       Root MSE      =  16.609

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.239016   .0780132    15.88   0.000     1.085498    1.392535
  towndummy1 |  -8.503099   4.273477    -1.99   0.048    -16.91266   -.0935374
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |   -9.73444   4.205409    -2.31   0.021    -18.01006   -1.458824
  towndummy5 |          0  (omitted)
  towndummy6 |   23.54015   7.718145     3.05   0.002     8.351993     38.7283
  towndummy7 |  -1.058055   6.407237    -0.17   0.869    -13.66654    11.55043
  towndummy8 |   5.736578    12.1756     0.47   0.638    -18.22319    29.69634
  towndummy9 |  -4.820164   5.620562    -0.86   0.392    -15.88059    6.240261
 towndummy10 |  -18.02253   5.089172    -3.54   0.000    -28.03725     -8.0078
 towndummy11 |   3.452562   6.431935     0.54   0.592    -9.204523    16.10965
 towndummy12 |  -12.22297   4.635843    -2.64   0.009    -21.34561   -3.100325
 towndummy13 |          0  (omitted)
 towndummy14 |  -12.77472   4.769803    -2.68   0.008    -22.16098   -3.388466
 towndummy15 |   -18.1363     4.5807    -3.96   0.000    -27.15043   -9.122166
 towndummy16 |  -12.98882   4.433257    -2.93   0.004    -21.71281   -4.264837
 towndummy17 |   24.12322   4.425692     5.45   0.000     15.41412    32.83232
 towndummy18 |          0  (omitted)
 towndummy19 |  -16.46421   5.587663    -2.95   0.003     -27.4599   -5.468528
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -4.714561   4.721496    -1.00   0.319    -14.00576    4.576636
 towndummy23 |          0  (omitted)
 towndummy24 |  -16.98117   5.437669    -3.12   0.002    -27.68169   -6.280654
 towndummy25 |          0  (omitted)
 towndummy26 |  -8.635474   6.818477    -1.27   0.206    -22.05322    4.782267
       _cons |   16.79276   3.905871     4.30   0.000     9.106593    24.47893
------------------------------------------------------------------------------

. 
. 
. reg sow3 insuredpig sow0 towndummy* ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 19,   301) =   89.08
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7915
                                                       Root MSE      =  16.171

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |    1.09293   .1495623     7.31   0.000     .7986095     1.38725
        sow0 |   .2975321   .1639901     1.81   0.071    -.0251802    .6202445
  towndummy1 |  -8.781994   3.923029    -2.24   0.026    -16.50203   -1.061958
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -10.82609   3.820607    -2.83   0.005    -18.34457   -3.307604
  towndummy5 |          0  (omitted)
  towndummy6 |    22.6597   7.515619     3.02   0.003     7.869891    37.44951
  towndummy7 |  -.6726962   5.956577    -0.11   0.910     -12.3945    11.04911
  towndummy8 |   5.539694   11.67863     0.47   0.636     -17.4424    28.52179
  towndummy9 |  -4.730038   5.581568    -0.85   0.397    -15.71387    6.253798
 towndummy10 |  -18.17448   5.269113    -3.45   0.001    -28.54344   -7.805511
 towndummy11 |   2.046185   6.393832     0.32   0.749    -10.53609    14.62846
 towndummy12 |  -13.67158    4.70749    -2.90   0.004    -22.93534   -4.407825
 towndummy13 |          0  (omitted)
 towndummy14 |  -11.81383   4.523107    -2.61   0.009    -20.71475   -2.912918
 towndummy15 |  -16.00278   4.747841    -3.37   0.001    -25.34595   -6.659621
 towndummy16 |  -12.68373   4.106234    -3.09   0.002    -20.76429   -4.603164
 towndummy17 |   22.95181   4.098487     5.60   0.000     14.88649    31.01712
 towndummy18 |          0  (omitted)
 towndummy19 |  -14.97392   5.761025    -2.60   0.010    -26.31091   -3.636935
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -5.508849   4.496773    -1.23   0.222    -14.35794    3.340245
 towndummy23 |          0  (omitted)
 towndummy24 |   -18.6474   4.916257    -3.79   0.000    -28.32199   -8.972816
 towndummy25 |          0  (omitted)
 towndummy26 |   -8.97035   6.167465    -1.45   0.147    -21.10716     3.16646
       _cons |   15.91168   3.603994     4.42   0.000     8.819463    23.00389
------------------------------------------------------------------------------

. 
. 
. reg sow4 insuredpig ,robust  

Linear regression                                      Number of obs =     321
                                                       F(  1,   319) =  223.78
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.6557
                                                       Root MSE      =  22.181

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.323082    .088445    14.96   0.000     1.149073    1.497091
       _cons |   13.21024   1.911003     6.91   0.000     9.450476       16.97
------------------------------------------------------------------------------

. 
. reg sow4 insuredpig towndummy* ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 18,   302) =   77.65
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7637
                                                       Root MSE      =  18.885

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.314203   .0898592    14.63   0.000     1.137373    1.491032
  towndummy1 |  -6.307413   4.834894    -1.30   0.193    -15.82176    3.206935
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -11.01804   4.648639    -2.37   0.018    -20.16586   -1.870211
  towndummy5 |          0  (omitted)
  towndummy6 |   24.64703   8.172837     3.02   0.003     8.564116    40.72995
  towndummy7 |   .2751637   7.006359     0.04   0.969     -13.5123    14.06263
  towndummy8 |   8.750139   14.27206     0.61   0.540    -19.33514    36.83541
  towndummy9 |  -1.843593    6.06324    -0.30   0.761    -13.77514    10.08795
 towndummy10 |  -15.24189   5.689848    -2.68   0.008    -26.43865   -4.045117
 towndummy11 |   14.26466   7.038333     2.03   0.044     .4142711    28.11504
 towndummy12 |  -13.37388   5.015002    -2.67   0.008    -23.24265   -3.505105
 towndummy13 |          0  (omitted)
 towndummy14 |   -6.86594   5.027801    -1.37   0.173     -16.7599    3.028018
 towndummy15 |   -17.3854   5.047095    -3.44   0.001    -27.31732   -7.453471
 towndummy16 |    -14.866     4.7928    -3.10   0.002    -24.29752   -5.434491
 towndummy17 |   29.07563   4.914415     5.92   0.000     19.40479    38.74646
 towndummy18 |          0  (omitted)
 towndummy19 |  -14.94036   6.144385    -2.43   0.016    -27.03159    -2.84913
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -5.004022   5.159454    -0.97   0.333    -15.15705    5.149011
 towndummy23 |          0  (omitted)
 towndummy24 |  -13.53203   6.808855    -1.99   0.048    -26.93083   -.1332195
 towndummy25 |          0  (omitted)
 towndummy26 |  -9.497976   7.223988    -1.31   0.190     -23.7137     4.71775
       _cons |   17.90556   4.275749     4.19   0.000     9.491524    26.31959
------------------------------------------------------------------------------

. 
. 
. reg sow4 insuredpig sow0 towndummy*  ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 19,   301) =   89.79
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7752
                                                       Root MSE      =  18.449

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |    1.15814   .1692814     6.84   0.000     .8250152    1.491265
        sow0 |   .3178501   .1896064     1.68   0.095    -.0552719    .6909721
  towndummy1 |  -6.605353   4.473556    -1.48   0.141    -15.40876    2.198054
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -12.18423   4.258919    -2.86   0.005    -20.56526   -3.803206
  towndummy5 |          0  (omitted)
  towndummy6 |   23.70646   7.941816     2.99   0.003     8.077951    39.33498
  towndummy7 |   .6868375   6.532279     0.11   0.916    -12.16788    13.54156
  towndummy8 |   8.539809    13.7422     0.62   0.535    -18.50313    35.58275
  towndummy9 |  -1.747313   5.986318    -0.29   0.771    -13.52765    10.03302
 towndummy10 |  -15.40421   5.936927    -2.59   0.010    -27.08735   -3.721071
 towndummy11 |   12.76224    7.20259     1.77   0.077    -1.411567    26.93605
 towndummy12 |  -14.92142   5.227191    -2.85   0.005    -25.20788   -4.634951
 towndummy13 |          0  (omitted)
 towndummy14 |  -5.839433   4.814586    -1.21   0.226    -15.31394    3.635078
 towndummy15 |  -15.10619    5.29449    -2.85   0.005    -25.52509   -4.687289
 towndummy16 |  -14.54007   4.467321    -3.25   0.001    -23.33121   -5.748937
 towndummy17 |   27.82422   4.575426     6.08   0.000     18.82034    36.82809
 towndummy18 |          0  (omitted)
 towndummy19 |   -13.3483   6.385019    -2.09   0.037    -25.91323   -.7833715
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   -5.85255   4.752992    -1.23   0.219    -15.20585     3.50075
 towndummy23 |          0  (omitted)
 towndummy24 |  -15.31204   6.408149    -2.39   0.017    -27.92249   -2.701595
 towndummy25 |          0  (omitted)
 towndummy26 |   -9.85572   6.541115    -1.51   0.133    -22.72783    3.016387
       _cons |   16.96431   3.985811     4.26   0.000     9.120721    24.80789
------------------------------------------------------------------------------

. 
. **********************************************
. 
. ****Table4 The Effect of Incentive Group Assignments on Subsequent Sow Production: Reduced-Form Results.
. 
. reg sow3 groupd2 groupd3 towndummy* ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 19,   301) =    9.87
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.2742
                                                       Root MSE      =   30.17

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   4.894994   4.477631     1.09   0.275    -3.916432    13.70642
     groupd3 |   9.195522   3.894265     2.36   0.019     1.532089    16.85896
  towndummy1 |  -1.884291   5.269718    -0.36   0.721    -12.25444    8.485863
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -6.528531   5.014699    -1.30   0.194    -16.39684    3.339777
  towndummy5 |          0  (omitted)
  towndummy6 |   37.49201   10.07394     3.72   0.000     17.66775    57.31628
  towndummy7 |   14.61317   7.292704     2.00   0.046     .2620245    28.96431
  towndummy8 |   31.24923   20.58269     1.52   0.130    -9.254957    71.75342
  towndummy9 |   5.996647    4.84633     1.24   0.217    -3.540333    15.53363
 towndummy10 |   29.78568   12.76351     2.33   0.020     4.668659     54.9027
 towndummy11 |   59.02994   13.27156     4.45   0.000     32.91316    85.14673
 towndummy12 |  -7.064885   7.681063    -0.92   0.358    -22.18027    8.050498
 towndummy13 |          0  (omitted)
 towndummy14 |   1.121933   5.406727     0.21   0.836    -9.517839    11.76171
 towndummy15 |   2.589566   5.479012     0.47   0.637    -8.192454    13.37159
 towndummy16 |  -.8122305   5.498789    -0.15   0.883    -11.63317    10.00871
 towndummy17 |   46.00216    5.85184     7.86   0.000     34.48646    57.51786
 towndummy18 |          0  (omitted)
 towndummy19 |   21.86884    6.15308     3.55   0.000     9.760342    33.97735
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   7.742296   5.651285     1.37   0.172    -3.378735    18.86333
 towndummy23 |          0  (omitted)
 towndummy24 |   4.935934   7.694115     0.64   0.522    -10.20514      20.077
 towndummy25 |          0  (omitted)
 towndummy26 |   2.670867   9.616334     0.28   0.781    -16.25289    21.59463
       _cons |   20.95419   5.262183     3.98   0.000     10.59887    31.30952
------------------------------------------------------------------------------

. 
. reg sow3 groupd2 groupd3 sow0 towndummy* ,robust 
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 20,   300) =   14.45
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.5465
                                                       Root MSE      =  23.889

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   7.109589   3.476832     2.04   0.042      .267521    13.95166
     groupd3 |   7.490596   3.182181     2.35   0.019     1.228373    13.75282
        sow0 |   1.119597   .1522378     7.35   0.000     .8200074    1.419186
  towndummy1 |  -5.518026   3.981345    -1.39   0.167    -13.35293    2.316876
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -12.04181   3.561132    -3.38   0.001    -19.04977   -5.033849
  towndummy5 |          0  (omitted)
  towndummy6 |   28.23007   8.206816     3.44   0.001     12.07985    44.38029
  towndummy7 |   8.756633   5.877602     1.49   0.137    -2.809918    20.32318
  towndummy8 |   19.42338   18.52514     1.05   0.295     -17.0323    55.87907
  towndummy9 |   1.738146   5.243269     0.33   0.740    -8.580099    12.05639
 towndummy10 |   8.497017   7.767584     1.09   0.275    -6.788835    23.78287
 towndummy11 |   29.05229   8.730792     3.33   0.001     11.87094    46.23364
 towndummy12 |  -14.44555   5.149158    -2.81   0.005    -24.57859   -4.312504
 towndummy13 |          0  (omitted)
 towndummy14 |  -.7428473   4.416079    -0.17   0.867    -9.433263    7.947568
 towndummy15 |   1.364205   4.678113     0.29   0.771    -7.841867    10.57028
 towndummy16 |  -4.472852   4.081948    -1.10   0.274    -12.50573    3.560025
 towndummy17 |     32.682   5.829304     5.61   0.000      21.2105    44.15351
 towndummy18 |          0  (omitted)
 towndummy19 |   10.37136   5.091728     2.04   0.043     .3513286    20.39138
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -.5581023   4.843946    -0.12   0.908    -10.09052    8.974314
 towndummy23 |          0  (omitted)
 towndummy24 |  -10.95784   5.434749    -2.02   0.045     -21.6529   -.2627845
 towndummy25 |          0  (omitted)
 towndummy26 |  -3.390338   7.348005    -0.46   0.645     -17.8505    11.06982
       _cons |   13.28021   4.174644     3.18   0.002      5.06492    21.49551
------------------------------------------------------------------------------

. 
. reg sow4 groupd2 groupd3 towndummy* ,robust  
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 19,   301) =   12.06
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.2934
                                                       Root MSE      =  32.711

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   5.145886   5.055037     1.02   0.310    -4.801803    15.09357
     groupd3 |   9.875711   4.282645     2.31   0.022     1.447994    18.30343
  towndummy1 |   .7555605   6.447689     0.12   0.907    -11.93269    13.44382
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -7.585571   5.941172    -1.28   0.203    -19.27706    4.105922
  towndummy5 |          0  (omitted)
  towndummy6 |    39.4903   10.96249     3.60   0.000     17.91747    61.06313
  towndummy7 |   16.93399   8.202952     2.06   0.040     .7915959    33.07639
  towndummy8 |    35.8502    23.1919     1.55   0.123    -9.788609      81.489
  towndummy9 |   9.642638    5.90023     1.63   0.103    -1.968285    21.25356
 towndummy10 |   35.47227   13.70243     2.59   0.010      8.50758    62.43697
 towndummy11 |   73.22226   13.69013     5.35   0.000     46.28177    100.1627
 towndummy12 |  -7.890796   8.195016    -0.96   0.336    -24.01758    8.235985
 towndummy13 |          0  (omitted)
 towndummy14 |   7.918303   6.338697     1.25   0.213    -4.555471    20.39208
 towndummy15 |    4.64047   6.581483     0.71   0.481    -8.311076    17.59202
 towndummy16 |  -1.919961   6.279762    -0.31   0.760    -14.27776    10.43784
 towndummy17 |   52.29595   6.608907     7.91   0.000     39.29043    65.30146
 towndummy18 |          0  (omitted)
 towndummy19 |   25.74615   6.949227     3.70   0.000     12.07093    39.42137
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   8.232763   6.885245     1.20   0.233    -5.316548    21.78207
 towndummy23 |          0  (omitted)
 towndummy24 |   9.765518   9.253045     1.06   0.292    -8.443333    27.97437
 towndummy25 |          0  (omitted)
 towndummy26 |   2.518478   10.43126     0.24   0.809    -18.00896    23.04592
       _cons |   22.23557    6.27031     3.55   0.000     9.896374    34.57476
------------------------------------------------------------------------------

. 
. reg sow4 groupd2 groupd3 sow0 towndummy* ,robust 
note: towndummy2 omitted because of collinearity
note: towndummy3 omitted because of collinearity
note: towndummy5 omitted because of collinearity
note: towndummy13 omitted because of collinearity
note: towndummy18 omitted because of collinearity
note: towndummy20 omitted because of collinearity
note: towndummy21 omitted because of collinearity
note: towndummy23 omitted because of collinearity
note: towndummy25 omitted because of collinearity

Linear regression                                      Number of obs =     321
                                                       F( 20,   300) =   17.61
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.5475
                                                       Root MSE      =   26.22

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   7.496951    4.04264     1.85   0.065     -.458571    15.45247
     groupd3 |   8.065721   3.537521     2.28   0.023     1.104223    15.02722
        sow0 |    1.18859   .1656549     7.18   0.000     .8625974    1.514583
  towndummy1 |  -3.102099   4.940922    -0.63   0.531    -12.82535    6.621157
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |   -13.4386   4.383973    -3.07   0.002    -22.06583   -4.811366
  towndummy5 |          0  (omitted)
  towndummy6 |    29.6576    8.83089     3.36   0.001     12.27927    47.03594
  towndummy7 |   10.71656   6.607186     1.62   0.106    -2.285741    23.71886
  towndummy8 |    23.2956   20.75135     1.12   0.263    -17.54105    64.13224
  towndummy9 |   5.121713   5.867339     0.87   0.383    -6.424642    16.66807
 towndummy10 |   12.87173    8.78975     1.46   0.144    -4.425646     30.1691
 towndummy11 |   41.39727   9.739038     4.25   0.000     22.23179    60.56275
 towndummy12 |  -15.72628   6.061913    -2.59   0.010    -27.65554   -3.797024
 towndummy13 |          0  (omitted)
 towndummy14 |   5.938608   5.183843     1.15   0.253    -4.262693    16.13991
 towndummy15 |   3.339599   5.652478     0.59   0.555     -7.78393    14.46313
 towndummy16 |  -5.806163   4.728936    -1.23   0.220    -15.11225    3.499923
 towndummy17 |   38.15495   6.426104     5.94   0.000       25.509     50.8009
 towndummy18 |          0  (omitted)
 towndummy19 |   13.54015   5.845906     2.32   0.021     2.035972    25.04432
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -.5791353    5.18049    -0.11   0.911    -10.77384    9.615567
 towndummy23 |          0  (omitted)
 towndummy24 |  -7.107692   7.341544    -0.97   0.334    -21.55514    7.339754
 towndummy25 |          0  (omitted)
 towndummy26 |  -3.916241   7.990611    -0.49   0.624    -19.64099    11.80851
       _cons |   14.08869   5.041521     2.79   0.006     4.167469    24.00992
------------------------------------------------------------------------------

. 
. ***********************************************
. ****Table 5: The Effect of Group Assignments on the Number of Insured Sows: First-Stage Results
. 
. reg insuredpig groupd2 groupd3  ,robust  

Linear regression                                      Number of obs =     480
                                                       F(  2,   477) =   13.52
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.0308
                                                       Root MSE      =  26.516

------------------------------------------------------------------------------
             |               Robust
  insuredpig |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |      6.075   2.027268     3.00   0.003      2.09152    10.05848
     groupd3 |   11.43333   2.405414     4.75   0.000     6.706816    16.15985
       _cons |   15.43333   .9768625    15.80   0.000     13.51385    17.35282
------------------------------------------------------------------------------

. 
. reg insuredpig groupd2 groupd3 towndummy* ,robust  
note: towndummy18 omitted because of collinearity

Linear regression                                      Number of obs =     480
                                                       F( 27,   452) =    5.94
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.1988
                                                       Root MSE      =  24.766

------------------------------------------------------------------------------
             |               Robust
  insuredpig |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   6.606172   2.072386     3.19   0.002     2.533465    10.67888
     groupd3 |    11.3358    2.68747     4.22   0.000     6.054315    16.61729
  towndummy1 |  -13.70398   4.398781    -3.12   0.002    -22.34858   -5.059384
  towndummy2 |  -.6198903   7.446935    -0.08   0.934     -15.2548    14.01502
  towndummy3 |   16.34679   15.01903     1.09   0.277      -13.169    45.86258
  towndummy4 |  -15.85577   4.281323    -3.70   0.000    -24.26954   -7.441999
  towndummy5 |  -2.195434    7.27816    -0.30   0.763    -16.49867     12.1078
  towndummy6 |  -6.354693   5.723899    -1.11   0.268    -17.60345    4.894063
  towndummy7 |  -6.404605   4.868611    -1.32   0.189    -15.97253    3.163316
  towndummy8 |   3.063867   8.347364     0.37   0.714    -13.34059    19.46833
  towndummy9 |  -9.450077   5.008707    -1.89   0.060    -19.29332    .3931663
 towndummy10 |   20.49653   10.83711     1.89   0.059    -.8008469    41.79391
 towndummy11 |   26.40612   10.12901     2.61   0.009     6.500326    46.31191
 towndummy12 |  -13.15322   6.310571    -2.08   0.038    -25.55492   -.7515241
 towndummy13 |  -17.23203   4.627759    -3.72   0.000    -26.32662   -8.137437
 towndummy14 |  -6.059808   5.091288    -1.19   0.235    -16.06534    3.945724
 towndummy15 |  -1.163018    4.93072    -0.24   0.814      -10.853    8.526963
 towndummy16 |   -7.75096   4.907969    -1.58   0.115    -17.39623    1.894309
 towndummy17 |  -.0461455   5.896887    -0.01   0.994    -11.63486    11.54257
 towndummy18 |          0  (omitted)
 towndummy19 |     12.764   5.790946     2.20   0.028     1.383482    24.14452
 towndummy20 |   3.640251   5.085362     0.72   0.474    -6.353636    13.63414
 towndummy21 |   1.415089   5.798104     0.24   0.807    -9.979497    12.80968
 towndummy22 |  -7.930796   4.789639    -1.66   0.098    -17.34352    1.481928
 towndummy23 |  -11.80745   5.113415    -2.31   0.021    -21.85647   -1.758435
 towndummy24 |  -5.396715   6.746248    -0.80   0.424    -18.65462    7.861188
 towndummy25 |  -18.55713   5.127206    -3.62   0.000    -28.63325   -8.481014
 towndummy26 |   -10.0603   6.200196    -1.62   0.105    -22.24509    2.124485
       _cons |   18.53759   4.268235     4.34   0.000     10.14954    26.92563
------------------------------------------------------------------------------

. 
. reg insuredpig groupd2 groupd3 sow0 towndummy*  ,robust   
note: towndummy18 omitted because of collinearity

Linear regression                                      Number of obs =     480
                                                       F( 28,   451) =    7.90
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.4546
                                                       Root MSE      =  20.456

------------------------------------------------------------------------------
             |               Robust
  insuredpig |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     groupd2 |   9.622303    2.06434     4.66   0.000     5.565385    13.67922
     groupd3 |   12.00696   2.418068     4.97   0.000     7.254878    16.75904
        sow0 |   .6694377   .1886365     3.55   0.000     .2987221    1.040153
  towndummy1 |  -4.506174    4.48183    -1.01   0.315    -13.31404    4.301689
  towndummy2 |   2.036011   5.465829     0.37   0.710    -8.705644    12.77767
  towndummy3 |   13.85859   9.573812     1.45   0.148    -4.956229    32.67341
  towndummy4 |  -8.735337   4.031245    -2.17   0.031    -16.65769   -.8129814
  towndummy5 |   1.869072   7.247247     0.26   0.797    -12.37349    16.11164
  towndummy6 |  -1.285892   4.428331    -0.29   0.772    -9.988617    7.416832
  towndummy7 |  -.2364441   4.702564    -0.05   0.960    -9.478102    9.005214
  towndummy8 |  -2.074637   10.42038    -0.20   0.842    -22.55316    18.40388
  towndummy9 |  -1.574113   4.562266    -0.35   0.730    -10.54005    7.391825
 towndummy10 |    18.2757   7.633164     2.39   0.017     3.274713    33.27668
 towndummy11 |   18.77458   7.307825     2.57   0.011     4.412964    33.13619
 towndummy12 |  -8.712155    4.00884    -2.17   0.030    -16.59048   -.8338315
 towndummy13 |  -5.684021   5.553599    -1.02   0.307    -16.59816    5.230123
 towndummy14 |   3.625288   5.212285     0.70   0.487    -6.618093    13.86867
 towndummy15 |   8.566105   5.050026     1.70   0.091    -1.358398    18.49061
 towndummy16 |   .7476936    4.60857     0.16   0.871    -8.309243     9.80463
 towndummy17 |   2.676943   5.415585     0.49   0.621    -7.965969    13.31986
 towndummy18 |          0  (omitted)
 towndummy19 |    16.2546   4.931355     3.30   0.001      6.56331    25.94588
 towndummy20 |   3.544644   4.683315     0.76   0.450    -5.659185    12.74847
 towndummy21 |   6.636894   5.115681     1.30   0.195    -3.416637    16.69042
 towndummy22 |  -2.407717    4.26574    -0.56   0.573    -10.79091    5.975476
 towndummy23 |  -7.927795   5.872268    -1.35   0.178     -19.4682    3.612609
 towndummy24 |  -2.102273   5.096997    -0.41   0.680    -12.11909     7.91454
 towndummy25 |  -8.292337   5.221643    -1.59   0.113    -18.55411    1.969434
 towndummy26 |  -2.740896    5.73242    -0.48   0.633    -14.00646    8.524673
       _cons |    2.13438   5.777544     0.37   0.712    -9.219868    13.48863
------------------------------------------------------------------------------

. 
. 
. ************************************************
. ****Table 6 : IV Regression Results on the Effect of Sow Insurance on Subsequent Sow Production.
. ****************
. 
. ivreg sow3 ( insuredpig= groupd2-groupd3 ) ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F(  1,   319) =   14.05
                                                       Prob > F      =  0.0002
                                                       R-squared     =  0.6242
                                                       Root MSE      =  21.087

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .9042706   .2412222     3.75   0.000     .4296831    1.378858
       _cons |   18.11635   5.530066     3.28   0.001      7.23634    28.99636
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   groupd2 groupd3
------------------------------------------------------------------------------

. 
. ivreg sow3 ( insuredpig= groupd2-groupd3 )  towndummy*  ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 18,   302) =   73.08
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7294
                                                       Root MSE      =   18.39

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .8541281   .2518681     3.39   0.001     .3584894    1.349767
  towndummy1 |  -27.83279   11.91743    -2.34   0.020     -51.2845   -4.381074
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -29.81417   12.37203    -2.41   0.017    -54.16047   -5.467867
  towndummy5 |          0  (omitted)
  towndummy6 |   6.512031   13.44213     0.48   0.628    -19.94007    32.96413
  towndummy7 |   -17.1471   9.440644    -1.82   0.070    -35.72487    1.430672
  towndummy8 |  -7.620438   17.67665    -0.43   0.667    -42.40544    27.16457
  towndummy9 |  -22.36416    11.1938    -2.00   0.047    -44.39187   -.3364456
 towndummy10 |  -24.10632   6.861384    -3.51   0.001     -37.6085   -10.60415
 towndummy11 |          0  (omitted)
 towndummy12 |  -31.58791   11.85134    -2.67   0.008    -54.90956   -8.266252
 towndummy13 |          0  (omitted)
 towndummy14 |  -30.03194   10.62098    -2.83   0.005    -50.93243   -9.131452
 towndummy15 |  -32.87891   9.448492    -3.48   0.001    -51.47213   -14.28569
 towndummy16 |   -30.5454   10.70335    -2.85   0.005    -51.60799   -9.482804
 towndummy17 |   9.714179     9.0575     1.07   0.284    -8.109625    27.53798
 towndummy18 |          0  (omitted)
 towndummy19 |  -25.51048   7.289333    -3.50   0.001     -39.8548   -11.16617
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -21.90763   10.85485    -2.02   0.044    -43.26834   -.5469184
 towndummy23 |          0  (omitted)
 towndummy24 |  -31.54417   9.131694    -3.45   0.001    -49.51398   -13.57436
 towndummy25 |  -20.62499   12.85376    -1.60   0.110    -45.91927    4.669296
 towndummy26 |  -26.18594   10.57644    -2.48   0.014    -46.99878   -5.373092
       _cons |   41.10626   14.59476     2.82   0.005     12.38595    69.82657
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. 
.  
. ivreg sow3 ( insuredpig= groupd2-groupd3 ) sow0 towndummy* ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =   51.48
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7701
                                                       Root MSE      =   16.98

------------------------------------------------------------------------------
             |               Robust
        sow3 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .7751357   .2443517     3.17   0.002     .2942816     1.25599
        sow0 |   .5374681   .2058047     2.61   0.009     .1324699    .9424662
  towndummy1 |   5.851191   3.765612     1.55   0.121    -1.559069    13.26145
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |   2.761959    3.58699     0.77   0.442    -4.296795    9.820713
  towndummy5 |          0  (omitted)
  towndummy6 |   38.00367   7.420064     5.12   0.000      23.4019    52.60544
  towndummy7 |   16.17998   6.471847     2.50   0.013     3.444189    28.91578
  towndummy8 |    23.3424   12.97046     1.80   0.073    -2.181857    48.86665
  towndummy9 |   11.12857   5.369406     2.07   0.039     .5622451     21.6949
 towndummy10 |    3.44361   7.343833     0.47   0.639    -11.00815    17.89537
 towndummy11 |   24.01986   8.403377     2.86   0.005     7.483048    40.55666
 towndummy12 |          0  (omitted)
 towndummy13 |          0  (omitted)
 towndummy14 |   4.895989   4.477987     1.09   0.275    -3.916136    13.70811
 towndummy15 |   2.959246    5.44719     0.54   0.587    -7.760152    13.67864
 towndummy16 |   3.341708   4.082941     0.82   0.414    -4.693015    11.37643
 towndummy17 |     39.422   4.481856     8.80   0.000     30.60226    48.24174
 towndummy18 |          0  (omitted)
 towndummy19 |   6.429205   7.007949     0.92   0.360    -7.361573    20.21998
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   9.818895   4.401065     2.23   0.026     1.158143    18.47965
 towndummy23 |          0  (omitted)
 towndummy24 |  -2.656236   4.714568    -0.56   0.574    -11.93392    6.621452
 towndummy25 |   14.18506   4.471478     3.17   0.002     5.385743    22.98438
 towndummy26 |   6.542172   6.416127     1.02   0.309    -6.083974    19.16832
       _cons |   2.932636   3.353696     0.87   0.383    -3.667024    9.532295
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   sow0 towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. 
. ivreg sow4 ( insuredpig= groupd2-groupd3 )  ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F(  1,   319) =   13.11
                                                       Prob > F      =  0.0003
                                                       R-squared     =  0.6068
                                                       Root MSE      =  23.704

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .9617497   .2656064     3.62   0.000     .4391882    1.484311
       _cons |   21.31601   6.089538     3.50   0.001     9.335284    33.29674
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   groupd2 groupd3
------------------------------------------------------------------------------

.   
. ivreg sow4 ( insuredpig= groupd2-groupd3 )  towndummy* ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 18,   302) =   92.26
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7196
                                                       Root MSE      =  20.573

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .9162433   .2809287     3.26   0.001     .3634178    1.469069
  towndummy1 |   -36.9884   13.17232    -2.81   0.005    -62.90955   -11.06725
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -42.47454   13.61621    -3.12   0.002    -69.26921   -15.67987
  towndummy5 |          0  (omitted)
  towndummy6 |  -3.654218   14.33947    -0.25   0.799    -31.87215    24.56372
  towndummy7 |  -27.05513   10.14144    -2.67   0.008    -47.01196     -7.0983
  towndummy8 |  -15.75534   20.05815    -0.79   0.433    -55.22678     23.7161
  towndummy9 |  -30.67824   12.23181    -2.51   0.013    -54.74862    -6.60787
 towndummy10 |  -32.22714      6.716    -4.80   0.000    -45.44322   -19.01105
 towndummy11 |          0  (omitted)
 towndummy12 |  -44.09131    12.9316    -3.41   0.001    -69.53877   -18.64385
 towndummy13 |          0  (omitted)
 towndummy14 |  -35.40407    11.6944    -3.03   0.003    -58.41691   -12.39124
 towndummy15 |  -43.32353   10.18702    -4.25   0.000    -63.37007   -23.27699
 towndummy16 |  -43.71366   11.67235    -3.75   0.000     -66.6831   -20.74423
 towndummy17 |   3.482393   9.714483     0.36   0.720    -15.63426    22.59904
 towndummy18 |          0  (omitted)
 towndummy19 |  -34.98869   7.438697    -4.70   0.000    -49.62693   -20.35045
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -33.47583   11.91346    -2.81   0.005    -56.91973   -10.03193
 towndummy23 |          0  (omitted)
 towndummy24 |  -39.28444   10.01408    -3.92   0.000    -58.99066   -19.57823
 towndummy25 |  -32.02028   14.23285    -2.25   0.025     -60.0284   -4.012155
 towndummy26 |  -38.33932   11.56345    -3.32   0.001    -61.09445   -15.58419
       _cons |   53.73961   16.17998     3.32   0.001     21.89984    85.57939
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. 
. ivreg sow4 ( insuredpig= groupd2-groupd3 ) sow0 towndummy* ,robust  

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =   61.48
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7562
                                                       Root MSE      =  19.213

------------------------------------------------------------------------------
             |               Robust
        sow4 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |    .828894   .2793351     2.97   0.003     .2791971    1.378591
        sow0 |   .5664325   .2299197     2.46   0.014     .1139789    1.018886
  towndummy1 |   9.312317   4.389449     2.12   0.035     .6744234    17.95021
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |   2.650636   4.082543     0.65   0.517    -5.383305    10.68458
  towndummy5 |          0  (omitted)
  towndummy6 |   40.36054   7.920746     5.10   0.000     24.77349    55.94759
  towndummy7 |   18.90399   7.222385     2.62   0.009     4.691225    33.11675
  towndummy8 |   27.74122   14.99652     1.85   0.065    -1.770085    57.25252
  towndummy9 |   15.43994   5.831078     2.65   0.009     3.965102    26.91478
 towndummy10 |   7.750071   8.724315     0.89   0.375    -9.418303    24.91844
 towndummy11 |   36.28492   9.840487     3.69   0.000     16.92006    55.64978
 towndummy12 |          0  (omitted)
 towndummy13 |          0  (omitted)
 towndummy14 |   12.22971   4.886391     2.50   0.013     2.613896    21.84552
 towndummy15 |    5.29632   6.300186     0.84   0.401    -7.101668    17.69431
 towndummy16 |   2.820018   4.541817     0.62   0.535    -6.117717    11.75775
 towndummy17 |   45.64509   5.114124     8.93   0.000     35.58113    55.70905
 towndummy18 |          0  (omitted)
 towndummy19 |   9.583277   8.112433     1.18   0.238     -6.38099    25.54754
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   10.78471   4.709231     2.29   0.023     1.517522    20.05189
 towndummy23 |          0  (omitted)
 towndummy24 |   2.012547   6.597729     0.31   0.761    -10.97097    14.99606
 towndummy25 |   15.45339   5.122593     3.02   0.003     5.372765    25.53402
 towndummy26 |   6.972975   6.850629     1.02   0.310    -6.508217    20.45417
       _cons |   2.760388   3.728443     0.74   0.460    -4.576727     10.0975
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   sow0 towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. 
. ************************************************
. ***Table 7: IV Estimates of the Longer-run Effects of Sow Insurance on Sow and Pig Production and the Spillover Effects on Other Livestocks (Sheep and Cows)
. ***use newly collected data in 2013---newdata_original
. sort villageid

. save,replace
file sow_data_2013oct.dta saved

. clear

. use newdata_original

. merge 1:1 villageid using sow_data_2013oct

    Result                           # of obs.
    -----------------------------------------
    not matched                            99
        from master                        99  (_merge==1)
        from using                          0  (_merge==2)

    matched                               480  (_merge==3)
    -----------------------------------------

. ***************************************************  
. ***average
. gen sow200810=(sow3+sow2009+sow2010)/3
(258 missing values generated)

. gen pig200810=(pig2008+pig2009+pig2010)/3
(258 missing values generated)

.  
. ivreg sow2009  ( insuredpig=groupd2 groupd3) sow0  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =   48.52
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.4939
                                                       Root MSE      =  20.534

------------------------------------------------------------------------------
             |               Robust
     sow2009 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .2910203   .2061758     1.41   0.159    -.1147081    .6967488
        sow0 |   .1637603   .1911757     0.86   0.392      -.21245    .5399706
  towndummy1 |   37.49991   3.855068     9.73   0.000     29.91361     45.0862
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -2.028915   3.730385    -0.54   0.587    -9.369852    5.312022
  towndummy5 |          0  (omitted)
  towndummy6 |   5.771919    4.43217     1.30   0.194    -2.950045    14.49388
  towndummy7 |   6.855622   4.389044     1.56   0.119    -1.781474    15.49272
  towndummy8 |   44.78641   15.65067     2.86   0.005     13.98783    75.58498
  towndummy9 |   25.04765   4.210973     5.95   0.000     16.76097    33.33432
 towndummy10 |   7.280198   8.297801     0.88   0.381    -9.048849    23.60925
 towndummy11 |   31.29602   17.04665     1.84   0.067    -2.249686    64.84172
 towndummy12 |          0  (omitted)
 towndummy13 |          0  (omitted)
 towndummy14 |  -3.679246    4.15695    -0.89   0.377    -11.85961    4.501119
 towndummy15 |  -1.993821   4.789561    -0.42   0.677    -11.41909    7.431444
 towndummy16 |  -8.462416   4.112308    -2.06   0.040    -16.55493   -.3699018
 towndummy17 |   25.79859    5.77976     4.46   0.000     14.42474    37.17245
 towndummy18 |          0  (omitted)
 towndummy19 |    -4.6259   7.021591    -0.66   0.511    -18.44352    9.191724
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   1.692808   4.330298     0.39   0.696    -6.828684     10.2143
 towndummy23 |          0  (omitted)
 towndummy24 |   6.008152   6.367401     0.94   0.346    -6.522107    18.53841
 towndummy25 |    9.69186   3.829203     2.53   0.012      2.15646    17.22726
 towndummy26 |   13.21913   4.578617     2.89   0.004      4.20898    22.22929
       _cons |    14.5137   4.181936     3.47   0.001     6.284167    22.74323
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   sow0 towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. ivreg sow2010  ( insuredpig=groupd2 groupd3) sow0  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =   42.82
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.4863
                                                       Root MSE      =  20.811

------------------------------------------------------------------------------
             |               Robust
     sow2010 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |     .29059   .2074882     1.40   0.162    -.1177212    .6989011
        sow0 |   .1646918   .1895997     0.87   0.386     -.208417    .5378006
  towndummy1 |    33.7673   3.283641    10.28   0.000      27.3055     40.2291
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -1.456319    3.07693    -0.47   0.636    -7.511337      4.5987
  towndummy5 |          0  (omitted)
  towndummy6 |   2.059248   3.742757     0.55   0.583    -5.306035    9.424532
  towndummy7 |   7.643089   3.847027     1.99   0.048     .0726145    15.21356
  towndummy8 |     43.628   15.47331     2.82   0.005     13.17844    74.07756
  towndummy9 |     25.212   3.564187     7.07   0.000     18.19812    32.22588
 towndummy10 |   6.945664   7.929791     0.88   0.382    -8.659186    22.55051
 towndummy11 |   41.06646   17.82727     2.30   0.022      5.98459    76.14834
 towndummy12 |          0  (omitted)
 towndummy13 |          0  (omitted)
 towndummy14 |  -3.900422     3.6474    -1.07   0.286    -11.07806    3.277212
 towndummy15 |  -2.744836   4.352475    -0.63   0.529    -11.30997    5.820297
 towndummy16 |  -7.885624   3.556152    -2.22   0.027    -14.88369   -.8875549
 towndummy17 |   27.57054   5.380781     5.12   0.000     16.98183    38.15925
 towndummy18 |          0  (omitted)
 towndummy19 |   -3.28409    6.73698    -0.49   0.626    -16.54163    9.973454
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   3.123276   3.741041     0.83   0.404    -4.238632    10.48518
 towndummy23 |          0  (omitted)
 towndummy24 |   6.178563   5.972371     1.03   0.302    -5.574326    17.93145
 towndummy25 |   8.017912   3.307712     2.42   0.016     1.508742    14.52708
 towndummy26 |   12.86535   4.024844     3.20   0.002     4.944954    20.78575
       _cons |   13.93463    3.81064     3.66   0.000     6.435762     21.4335
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   sow0 towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. ivreg sow200810  ( insuredpig=groupd2 groupd3) sow0  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =   47.72
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.6188
                                                       Root MSE      =  17.112

------------------------------------------------------------------------------
             |               Robust
   sow200810 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .4522487   .1750761     2.58   0.010     .1077205    .7967768
        sow0 |   .2886401    .151193     1.91   0.057    -.0088892    .5861693
  towndummy1 |   25.70613   2.932682     8.77   0.000     19.93498    31.47729
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -.2410914   2.867792    -0.08   0.933    -5.884552    5.402369
  towndummy5 |          0  (omitted)
  towndummy6 |   15.27828   4.103972     3.72   0.000     7.202171    23.35439
  towndummy7 |   10.22623   3.645819     2.80   0.005      3.05171    17.40075
  towndummy8 |   37.25227   14.30388     2.60   0.010     9.104002    65.40053
  towndummy9 |   20.46274   3.685295     5.55   0.000     13.21054    27.71495
 towndummy10 |   5.889824   6.753572     0.87   0.384    -7.400373    19.18002
 towndummy11 |   32.12745   13.03159     2.47   0.014     6.482891      57.772
 towndummy12 |          0  (omitted)
 towndummy13 |          0  (omitted)
 towndummy14 |  -.8945599   3.297964    -0.27   0.786    -7.384545    5.595425
 towndummy15 |  -.5931372   3.947077    -0.15   0.881    -8.360498    7.174223
 towndummy16 |  -4.335443   3.195667    -1.36   0.176    -10.62412    1.953235
 towndummy17 |   30.93038   4.433217     6.98   0.000     22.20635     39.6544
 towndummy18 |          0  (omitted)
 towndummy19 |  -.4935951   5.772596    -0.09   0.932    -11.85335    10.86616
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |   4.878326   3.422467     1.43   0.155    -1.856667    11.61332
 towndummy23 |          0  (omitted)
 towndummy24 |   3.176826   4.918897     0.65   0.519    -6.502955    12.85661
 towndummy25 |   10.63161   3.065375     3.47   0.001     4.599332    16.66389
 towndummy26 |   10.87555   3.386971     3.21   0.001     4.210412    17.54069
       _cons |   10.46032   3.166592     3.30   0.001      4.22886    16.69178
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   sow0 towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

.  
. ivreg pig2009  ( insuredpig=groupd2 groupd3) pig  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =  124.20
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.8506
                                                       Root MSE      =  75.431

------------------------------------------------------------------------------
             |               Robust
     pig2009 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |    1.28434   .9500609     1.35   0.177    -.5852624    3.153943
         pig |  -.0794729   .0592542    -1.34   0.181    -.1960778     .037132
  towndummy1 |   241.4424   31.53689     7.66   0.000     179.3817    303.5031
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -212.8077   37.61997    -5.66   0.000    -286.8392   -138.7763
  towndummy5 |          0  (omitted)
  towndummy6 |  -174.3495   31.51908    -5.53   0.000    -236.3751   -112.3238
  towndummy7 |  -257.5397   26.04767    -9.89   0.000    -308.7983   -206.2811
  towndummy8 |   4.385305   31.00093     0.14   0.888    -56.62069     65.3913
  towndummy9 |  -100.8843   31.79881    -3.17   0.002    -163.4604   -38.30814
 towndummy10 |  -201.5386   16.17603   -12.46   0.000    -233.3711   -169.7062
 towndummy11 |          0  (omitted)
 towndummy12 |  -288.5889    31.6861    -9.11   0.000    -350.9433   -226.2346
 towndummy13 |          0  (omitted)
 towndummy14 |  -204.5203   33.66014    -6.08   0.000    -270.7593   -138.2813
 towndummy15 |  -215.2465   21.56234    -9.98   0.000    -257.6786   -172.8145
 towndummy16 |  -386.4317   26.19224   -14.75   0.000    -437.9748   -334.8886
 towndummy17 |   19.06013   43.50515     0.44   0.662    -66.55262    104.6729
 towndummy18 |          0  (omitted)
 towndummy19 |  -311.1341   20.27655   -15.34   0.000    -351.0358   -271.2323
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -284.0517   32.17732    -8.83   0.000    -347.3727   -220.7307
 towndummy23 |          0  (omitted)
 towndummy24 |  -235.5447   36.08932    -6.53   0.000    -306.5641   -164.5254
 towndummy25 |  -242.9103   35.07528    -6.93   0.000    -311.9341   -173.8864
 towndummy26 |  -250.0891   28.71061    -8.71   0.000    -306.5881   -193.5902
       _cons |   540.1816   28.75713    18.78   0.000     483.5911    596.7721
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   pig towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. ivreg pig2010  ( insuredpig=groupd2 groupd3) pig  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =  113.00
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.7822
                                                       Root MSE      =  78.572

------------------------------------------------------------------------------
             |               Robust
     pig2010 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.486108   1.006993     1.48   0.141    -.4955291    3.467745
         pig |  -.0998549   .0609532    -1.64   0.102    -.2198032    .0200934
  towndummy1 |   126.3822   32.99061     3.83   0.000     61.46078    191.3037
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -234.1195   38.04189    -6.15   0.000    -308.9812   -159.2577
  towndummy5 |          0  (omitted)
  towndummy6 |   -236.311   30.96285    -7.63   0.000     -297.242   -175.3799
  towndummy7 |   -240.734   25.60661    -9.40   0.000    -291.1247   -190.3433
  towndummy8 |    .682412   30.32312     0.02   0.982    -58.98974    60.35456
  towndummy9 |  -67.81167   31.94228    -2.12   0.035    -130.6701   -4.953213
 towndummy10 |  -171.2663   17.74609    -9.65   0.000    -206.1884   -136.3442
 towndummy11 |          0  (omitted)
 towndummy12 |  -267.0772   29.70296    -8.99   0.000     -325.529   -208.6255
 towndummy13 |          0  (omitted)
 towndummy14 |  -207.1037   33.16351    -6.24   0.000    -272.3654    -141.842
 towndummy15 |  -216.9728   20.74804   -10.46   0.000    -257.8024   -176.1432
 towndummy16 |  -387.2836   25.81805   -15.00   0.000    -438.0904   -336.4769
 towndummy17 |  -42.30545   44.65512    -0.95   0.344    -130.1812    45.57031
 towndummy18 |          0  (omitted)
 towndummy19 |  -314.0222   20.40004   -15.39   0.000    -354.1669   -273.8774
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -286.5411    30.4908    -9.40   0.000    -346.5432    -226.539
 towndummy23 |          0  (omitted)
 towndummy24 |  -240.1767   36.09096    -6.65   0.000    -311.1992   -169.1541
 towndummy25 |  -265.0144   35.05977    -7.56   0.000    -334.0077   -196.0211
 towndummy26 |  -259.7195   28.34212    -9.16   0.000    -315.4933   -203.9457
       _cons |    545.895   28.96487    18.85   0.000     488.8957    602.8943
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   pig towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

. ivreg pig200810  ( insuredpig=groupd2 groupd3) pig  towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     321
                                                       F( 19,   301) =  108.37
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.8008
                                                       Root MSE      =  75.379

------------------------------------------------------------------------------
             |               Robust
   pig200810 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   1.345747   .9569725     1.41   0.161    -.5374564    3.228951
         pig |  -.0847372   .0594166    -1.43   0.155    -.2016617    .0321874
  towndummy1 |   142.9717   30.52629     4.68   0.000     82.89969    203.0436
  towndummy2 |          0  (omitted)
  towndummy3 |          0  (omitted)
  towndummy4 |  -222.5324    37.0297    -6.01   0.000    -295.4023   -149.6625
  towndummy5 |          0  (omitted)
  towndummy6 |  -193.2185   30.11123    -6.42   0.000    -252.4737   -133.9633
  towndummy7 |   -253.404   24.83689   -10.20   0.000    -302.2799   -204.5281
  towndummy8 |  -24.92306    29.9638    -0.83   0.406    -83.88812    34.04201
  towndummy9 |   -113.029   30.64973    -3.69   0.000    -173.3439   -52.71408
 towndummy10 |  -192.3448   14.76204   -13.03   0.000    -221.3947   -163.2949
 towndummy11 |          0  (omitted)
 towndummy12 |  -286.8596   28.06027   -10.22   0.000    -342.0788   -231.6404
 towndummy13 |          0  (omitted)
 towndummy14 |  -201.1859   32.63204    -6.17   0.000    -265.4017     -136.97
 towndummy15 |  -213.1607   20.17823   -10.56   0.000     -252.869   -173.4525
 towndummy16 |   -382.754   24.98269   -15.32   0.000    -431.9169   -333.5912
 towndummy17 |  -15.51906   43.46711    -0.36   0.721     -101.057    70.01884
 towndummy18 |          0  (omitted)
 towndummy19 |  -317.9689   19.48797   -16.32   0.000    -356.3189    -279.619
 towndummy20 |          0  (omitted)
 towndummy21 |          0  (omitted)
 towndummy22 |  -281.2912   29.84664    -9.42   0.000    -340.0257   -222.5567
 towndummy23 |          0  (omitted)
 towndummy24 |  -245.4861   36.23571    -6.77   0.000    -316.7935   -174.1787
 towndummy25 |  -253.7571   33.79472    -7.51   0.000    -320.2609   -187.2533
 towndummy26 |  -249.5332   27.64977    -9.02   0.000    -303.9445   -195.1219
       _cons |   538.7146   27.48119    19.60   0.000      484.635    592.7942
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   pig towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

.  
.  
. ivreg sheep2008  ( insuredpig=groupd2 groupd3)goat    towndummy*  ,robust  

Instrumental variables (2SLS) regression               Number of obs =     334
                                                       F( 27,   306) =   24.26
                                                       Prob > F      =  0.0000
                                                       R-squared     =  0.4863
                                                       Root MSE      =  28.851

------------------------------------------------------------------------------
             |               Robust
   sheep2008 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |   .5920362   .3727918     1.59   0.113    -.1415236    1.325596
        goat |   -.011145   .0237231    -0.47   0.639     -.057826    .0355361
  towndummy1 |  -28.58515   33.81245    -0.85   0.399     -95.1195    37.94919
  towndummy2 |  -36.37933   32.10314    -1.13   0.258    -99.55018    26.79152
  towndummy3 |  -23.64014   32.29451    -0.73   0.465    -87.18757    39.90728
  towndummy4 |  -17.64435   33.36458    -0.53   0.597    -83.29741     48.0087
  towndummy5 |  -16.29321   33.18733    -0.49   0.624    -81.59748    49.01105
  towndummy6 |  -8.509127   33.27435    -0.26   0.798    -73.98462    56.96636
  towndummy7 |   36.04011   34.20316     1.05   0.293    -31.26305    103.3433
  towndummy8 |   14.74249   38.84798     0.38   0.705    -61.70049    91.18547
  towndummy9 |   -27.4619   32.93943    -0.83   0.405    -92.27836    37.35455
 towndummy10 |  -11.48428   33.20332    -0.35   0.730    -76.82001    53.85144
 towndummy11 |          0  (omitted)
 towndummy12 |  -11.77891   33.33423    -0.35   0.724    -77.37223     53.8144
 towndummy13 |   44.82162   34.04879     1.32   0.189    -22.17777     111.821
 towndummy14 |  -16.66416   32.88706    -0.51   0.613    -81.37756    48.04924
 towndummy15 |   11.31078   32.67588     0.35   0.729    -52.98707    75.60863
 towndummy16 |  -3.202648   32.54959    -0.10   0.922    -67.25199    60.84669
 towndummy17 |  -10.06863   32.35939    -0.31   0.756     -73.7437    53.60645
 towndummy18 |  -30.49995   32.54884    -0.94   0.349    -94.54783    33.54793
 towndummy19 |  -10.10411   31.72292    -0.32   0.750    -72.52679    52.31856
 towndummy20 |   17.18124   33.26991     0.52   0.606    -48.28552    82.64801
 towndummy21 |   40.06599   33.56843     1.19   0.234    -25.98818    106.1201
 towndummy22 |   2.028102   33.12277     0.06   0.951    -63.14911    67.20532
 towndummy23 |  -30.67426   33.43806    -0.92   0.360    -96.47189    35.12337
 towndummy24 |  -22.49678   33.52986    -0.67   0.503    -88.47505     43.4815
 towndummy25 |  -9.777578    34.4121    -0.28   0.777    -77.49187    57.93671
 towndummy26 |  -19.19367   32.77253    -0.59   0.559    -83.68171    45.29437
       _cons |   33.29092   35.16554     0.95   0.345    -35.90595    102.4878
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   goat towndummy1 towndummy2 towndummy3 towndummy4 towndummy5
               towndummy6 towndummy7 towndummy8 towndummy9 towndummy10
               towndummy11 towndummy12 towndummy13 towndummy14 towndummy15
               towndummy16 towndummy17 towndummy18 towndummy19 towndummy20
               towndummy21 towndummy22 towndummy23 towndummy24 towndummy25
               towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

.  
. ivreg cow2008  ( insuredpig=groupd2 groupd3) cow   towndummy*  ,robust

Instrumental variables (2SLS) regression               Number of obs =     477
                                                       F(  0,   449) =       .
                                                       Prob > F      =       .
                                                       R-squared     =  1.0000
                                                       Root MSE      =  4.3e-13

------------------------------------------------------------------------------
             |               Robust
     cow2008 |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
  insuredpig |  -2.19e-14   5.27e-15    -4.15   0.000    -3.23e-14   -1.15e-14
     cow2008 |          1   1.11e-15  9.0e+14   0.000            1           1
  towndummy1 |   4.41e-13   1.73e-13     2.54   0.011     1.00e-13    7.81e-13
  towndummy2 |   3.15e-13   1.77e-13     1.78   0.076    -3.29e-14    6.63e-13
  towndummy3 |   4.41e-13   1.82e-13     2.41   0.016     8.20e-14    7.99e-13
  towndummy4 |  -1.49e-14   7.08e-14    -0.21   0.834    -1.54e-13    1.24e-13
  towndummy5 |   4.09e-13   1.51e-13     2.71   0.007     1.13e-13    7.05e-13
  towndummy6 |  -8.88e-16   1.19e-13    -0.01   0.994    -2.34e-13    2.32e-13
  towndummy7 |   5.16e-13   1.44e-13     3.59   0.000     2.33e-13    7.99e-13
  towndummy8 |   5.06e-13   2.04e-13     2.49   0.013     1.06e-13    9.06e-13
  towndummy9 |   1.49e-13   1.15e-13     1.29   0.197    -7.74e-14    3.75e-13
 towndummy10 |   8.10e-13   3.12e-13     2.60   0.010     1.97e-13    1.42e-12
 towndummy11 |   7.00e-13   3.26e-13     2.15   0.032     6.05e-14    1.34e-12
 towndummy12 |   1.78e-13   1.37e-13     1.30   0.195    -9.15e-14    4.47e-13
 towndummy13 |          0  (omitted)
 towndummy14 |   1.10e-13   1.01e-13     1.09   0.277    -8.88e-14    3.09e-13
 towndummy15 |   2.51e-13   1.44e-13     1.74   0.082    -3.23e-14    5.34e-13
 towndummy16 |   4.45e-13   1.38e-13     3.23   0.001     1.75e-13    7.15e-13
 towndummy17 |   3.27e-13   1.51e-13     2.17   0.030     3.10e-14    6.23e-13
 towndummy18 |   2.68e-13   1.42e-13     1.88   0.060    -1.17e-14    5.47e-13
 towndummy19 |   7.77e-13   2.30e-13     3.38   0.001     3.26e-13    1.23e-12
 towndummy20 |   2.91e-13   1.48e-13     1.96   0.051    -7.38e-16    5.82e-13
 towndummy21 |  -8.98e-14   1.68e-13    -0.53   0.593    -4.20e-13    2.40e-13
 towndummy22 |   1.91e-13   1.06e-13     1.80   0.073    -1.76e-14    4.00e-13
 towndummy23 |   1.64e-13   1.62e-13     1.01   0.313    -1.55e-13    4.83e-13
 towndummy24 |   3.01e-13   1.79e-13     1.68   0.093    -5.09e-14    6.54e-13
 towndummy25 |   2.18e-13   1.26e-13     1.72   0.086    -3.06e-14    4.66e-13
 towndummy26 |   1.95e-13   1.35e-13     1.44   0.149    -7.03e-14    4.59e-13
       _cons |  -8.53e-14   2.08e-13    -0.41   0.682    -4.93e-13    3.23e-13
------------------------------------------------------------------------------
Instrumented:  insuredpig
Instruments:   cow2008 towndummy1 towndummy2 towndummy3 towndummy4
               towndummy5 towndummy6 towndummy7 towndummy8 towndummy9
               towndummy10 towndummy11 towndummy12 towndummy13 towndummy14
               towndummy15 towndummy16 towndummy17 towndummy18 towndummy19
               towndummy20 towndummy21 towndummy22 towndummy23 towndummy24
               towndummy25 towndummy26 groupd2 groupd3
------------------------------------------------------------------------------

.  
. 
.  
. log close
      name:  <unnamed>
       log:  E:\p2014\project2014sow\zhoula\sow_main.log
  log type:  text
 closed on:  29 May 2014, 15:23:35
----------------------------------------------------------------------------------------------------------------------------------------------------------------
